I use the 340.106 legacy driver. It does not agree with the current ABI changes. IgnoreABI leads to a black screen without further action...
But the nouveau driver works nicely.
Just for info, and have a nice day
Franz
edit:
the line addressing nouveau: without FreeCAD, unfortunately, which needs OpenGL
was my error: reinstalling xorg-server after removal of the nvidia driver made glx work flawlessly